{
  "manageEntity": {
    "action": "Save",
    "entityId": "2108813681",
    "entityType": "Track",
    "nonce": "0xc7608a039aabe6bd978b028c07ddef3c859bbce7c1c4af01675fe563c3377c98",
    "signature": "0x38bcec5abd688af5a9528d8dad2cee209b88b932248abc22017b742d1e72db385e37339266639bb7f3b1d1a917b693f2775ee33d3a1f2f8c1333fe7037e272541b",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}